Just to illustrate that this capability is widely shared in the animal kingdom, here’s an amusing little video that just came across my desk about foxes using magnetic sense to help orient themselves when catching mice under the snow. The video doesn’t explain HOW they use it and, from a little quick research, it appears that the scientists apparently haven’t figured that out yet. But they have confirmed that the fox is much more likely to catch his mouse if he orients himself toward magnetic north! Apparently still a lot of scientific head-scratching going on about how he’s using that! Makes me wonder if the mice are using mag-sensing too?